William e



(No Model) W. E, SPARKS.

KNOB ATTACHMENT.

Patented Mar. 1, 1892.

'NtTED STATES Fries.

PATENT WILLIAM E. SPARKS, OF NEW HAVEN, CONNECTICUT, A SSIGNOR TO THE SARGENT & COMPANY, OF SAME PLACE.

KNOB ATTACHMENT.

SPECIFICATION forming part of Letters Patent No. 469,953, dated March 1, 1892.

Application filed November 9, 1891. Serial N0- 4l1,335- (No model.)

To all whmn it may concern:

Be it known that I, WILLIAM E. SPARKS, of New Haven, in the county of New Haven and State of Connecticut, have invented a new Improvement in Attaching Knobs to Knob- Latches; and I do hereby declare the follow.- ing, when taken in connection with accompanying drawings and the letters of reference marked thereon, to be a full, clear, and exact description of the same, and which said drawingsconstitute part of this specification, and represent, in

Figure 1, a side view of the spindle, showing the lever as in position for introduction into the hub; Fig. 2,the same as Fig. 1,showing the level thrown to project the engagingshoulder; Fig. 3, a side view of the spindle, looking upon the edge of the lever, Fig. 4, a longitudinal section of the hub as arranged in a lock-case with the spindle inserted preparatory to engagement therewith; Fig. 5, the same as Fig. 4, representing the lever as thrown into engagement with thehub; and Figs. 6 and 7, modifications.

This invention relates to an improvement in the means for attaching knobs to that class of latches-in which a knob is employed upon but one side of the door. In such cases the spindleto which the knob is applied extends into one side of the door and through the hub of the latch, the spindle only being of sufficient length to make the proper engagement with the hub, and so that in the rotation of the knob on one side of the door the latch will be operated, but no knob or connection with the hub exposed upon the reverse side of the door. In the more general construction of this class of connections the knob is made fast to the spindle and the knob secured to the door by means of a rose or some device independentof the hub of the latch itself. Consequently all strain in the direction of the pull upon the knob necessarily comes upon the connection between the door and the knob, butindependent of the lock itself. In another construction the spindle is divided longitudinally into two separate and detached parts, one of said parts constructed with a projectingshoulderat its inner end, so that the shoulder by being first introduced through the hub, so as to bring its shoulder upon the end of the hub opposite that to which it is introduced, and then the sec-,

0nd part of the spindle is introduced to the hub, the two parts of the spindle filling the hub, so as to prevent the withdrawal of the shoulder. After the spindle has been thus introduced the knob is applied, and the knobscrew introduced secures the knob and the two parts of the spindle together, and sothat the pull upon the knob willbring the strain upon the reverse end of the hub. This construction leaves the spindle in two separate and detached. parts, liable to loss or separation before being applied, and the application is difficult and uncertain to make.

The object of my invention is to produce a positive and firm connection between the knob and the hub through the spindle and one which is easy of application; and the invention consists in the construction, as hereinafter described, and particularly recited in the claim.

In the illustration, A represents the hub of a common mortise or other knob latch, it having a longitudinal opening through it of angular shape corresponding to the shape of the spindle, as in the usual construction.

The spindle is constructed in two parts, B, Fig. 3, representing the principal or body part and C the second or interlocking part. This interlocking part is in the form of a lever applied at one side of the body B of the spindle. It is hung to the body by a pivot D, so as toswing thereon in the plane of the side of the spindle to which itis attached, as from the position seen in Fig. 1 to that in Fig. 2, and return. On one side of the lever and at its inner end the lever is constructed with an outwardly-projecting shoulder E; but this shouldered end is of a width corresponding substantially to the width of the spindle, so that in the position seen in Fig. l the shoulder is flush or within the corresponding side of the spindle, while the other side of the lever is substantially flush or in line or within the line of that side of the spindle. Distant from the shoulder E, corresponding to the length of the hub, a similar shoulder F is preferably formed. The other end or seen at G, Fig. 1, the said other end of the lever will project beyond that side of the spindle, as seen in Fig. 1, and the extreme end of the lever is beveled, as seen at H, Fig. 1. Under this construction, if the lever be turned upon the body of the spindle so as to bring the before-projecting side G flush with that side of the spindle, as seen in Fig. 2, the shoulder E will be thrown outward beyond its side of the spindle, as also seen in Fig. 2. The body B of the spindle and the lever O in transverse section correspond in angular shape and size substantially to the shape and size of the opening through the hub of the latch to which it is to be attached, and the length of the spindle is such that' when the spindle is engaged with the hub, as hereinafter described, the spindle will project through the door sufficiently far to receive the knob in the usual manner.

In applying the spindle the lever is turned to bring the shoulder E onto, the surface of the spindle, as seen in Fig. 1,and in this condition the combined spindle and lever is inserted through the hub, as seen in Fig. 4. Then the knob I, which has its neck J constructed with the usual longitudinal recess corresponding to the angular shape and size of the spindle, is set on over the spindle, as usual, and in thus placing the knob upon the spindle the neck strikes the then-projecting end H of the lever and operates thereon as acam, which will force the lever to turn upon its pivot and throw the shoulder E outward over the reverse end of the hub, as seen in Fig. 5, so that the spindle interlocks therewith, the knob being seen red to the spindle when properly adjusted in the usual manner. Thus a positive lock is produced between the hub of the latch and the knob, securing the knob to the door through the iustrumental'ity of the hub itself, so that all strain in the direction of a pull will come upon the hub, and any force which it applies in the opposite direction, as a push, will be resisted by the hub because of the shoulder F, which is thrown out over the forward end of the hub. \Vhen the spindle is inserted, as seen in Fig. 4, the lever may be turned by hand to the locking position, as seen in Fig. 5, before the knob is applied, it not being essential to the interlocking of the spindle with the hub that it shall be performed by the application of the knob to the spindle.

Instead of hanging the lever so that the projection G of the lever, by means of which the shoulder is thrown into engagement with the hub, is on the same side of the lever as the shoulder, it may be placed on the reverse side, as represented in Fig. 6, and this is accomplished by applying the pivot D at the knob end of the leverinstead of midway of the length of the lever, as shown, but so that as the knob is applied it will strike the then-projecting side G of the lever and force the lever to turn, as represented in Fig. 7, so as to project the shoulder E beyond its side of the spindle.

While preferring to employ the shoulder F as a means to resist the thrust of the knob, that shoulder may be omitted.

I claim- The herein-described spindle for the attachment of knobs to knob-latches, consisting of the body B, combined with the lever G, pivoted to' one side of the body of the spindle,

the body and lever in transverse section of angular shape and corresponding to the shape of the opening through the hub of the latch, and the recess in the neck of the knob of the spindle, the said lever adapted to swing upon its pivot and constructed with an engaging shoulder E at one end, and the lever at the other end adapted to project beyond one side of the spindle, while the shoulder lies ,fiush upon its side of the spindle, and vice versa, substantially as described.

In testimony whereof I have signed this specification in the presence of two subscribing witnesses.

WILLIAM E. SPARKS. Witnesses:

ELLlOTT LITTLEJOHN, WILLIAM S. COOKE. 

